Separator.



Patented October 18, 1904.

i UNITED,-v l"STATES PATENT OFFICE.

FREDERICK H. EEMis, or EINGHAM CANYON, UTAH, AssiGNoE lor Two- THiEDs To ENos A. WALL AND eEoEGEL. EEMIs, .or SALT LAKE CITY, UTAH.

SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 772,860,vdated October 18, 1904.

' Application inea september 9,1903. serial No. 172,499. cio mais.)

. To @ZZ whom t indy concern/:

Be it known that I, FREDERICK H. BEMIs, a citizen of the UnitedStates, residing at Bingham Canyon, ind the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Separators, of which the following is a specification.

, My invention relates to that class of separators in whicha plurality of inclined screens of different mesh are mounted in a vertically and bodily movable frame, which frame is retracted against the action of a spring and then vsuddenly released and thrown into contact with a bumper. cam, spring, and bumper were located at about the middle of the screen-frame and the frame was carried by two pairs of links forl bodily movement.

The object of my invention is to improve such prior construction by having the screenframe `extended upwardly'at an incline from its lower pivoted end and to provide a cam engaging the higher end of the screen-frame to depress'it against the action of a spring and suddenly release it, so that the highend of the frame, which is the end at which the ore is fed, and therefore the heavier, will liy up against a bumper with suiiicient force to cause the ore particles to be thrown upwardly out of interstices of the screens, and so clear them at every stroke. Furthermore,in throwpendicular to the 'inclined surfaces of the screens and not at an anglethereto, as in'said prior construction, and soin its return movement the ore will fall upon the screens a short distance nearer the discharge yends thereof and the oversize particles for every screen will thusbe moved toward the discharge end thereof and be discharged into suitable receptacles. Thus all clogging ofthe vscreens by the usually moist ores will be prevented.

A further )bjectof the invention is to provide a screen-frame'which shall'be adjustable at its pivoted end, so thatits inclination and the inclination of the series of screens may be changed at pleasure.

These objects I accomplish by the mechan In such prior separator the ismshown in the accompanying drawings, in which- Figure l is a sectional side elevation of my improved separator. Fig. 2 is la front end elevation, and Fig. 3 is a perspective of one of the screens.

A indicates the stationary bed, at the front or head end of which the parallel uprights A A are secured. The upper ends of the uprights A A are connected by the bufferforming cross-bar A2, which is connected to the base A by the long bolts AiAS, so that an absolutely rigid construction capable of resisting the necessary jarring' of thescreenframe B is afforded. A .The rear or tail end of the' baseis provided with short uprights A4 Af, which are -connected at their upper ends to the top`crosspiece A2 by the inclined braces A5. The inclined screen-carrying frame B comprises a bottom or main portion B', pivoted at its lower end on a rod b, mounted in any of a sevries of apertures b2 in the uprights Af, and

-the bar A2l with any desireddegree ofV force. ing the ore upwardly it will be on a line per-V The upper half o f vthe screen-frame B is provided with a suitable housing or boxing B2 to receive the individual screens B3, which, as usuahvary in mesh, the coarsest being at the top and the finest at the bottom, all the screens being inclined parallelto the screen-frame B.

VThese individual screens rest one upon the other or may be inserted in the commonlyemployed slideways, as may be desired, and

(Not Y y top frame-bar A2 and provided with a drivepulley CZ and a suitable cam or tappet (Z/` with the arms of which engage a projection Bl at the upper forward portion of the screenframe, so that as the cam is rotated it will depress the high end of the screen-frame B and suddenly release it, whereupon the spring C will throw the screen-frame upwardly against the buffer-bar A2. This action will cause the material to be thrown upwardly to clear the screens of all material sticking in their meshes, and the eoarser material will also be thrown upward on a line perpendicular to the inclined faces of the screens and not at an angle thereto, as would be the case were the screen-frame not pivoted at one end and receiving its bumping action at its middle. It will be seen, therefore, that the material will not fall upon the same spot from which it was projected, but it will fall slightly to the rear or toward the discharge ends, and so the escape of the coarser material from the several screens will be greatly facilitated and not depend on the ineline of the screens alone. This is very important where the material being separated contains flat-sided particles of crushed rock, 85e. The bumping action takes place at the high end, which gives the length of the stroke at that end twice what it is at the lower end of the screens and of course a diminishing length of throw from the head or high end down, and this is very important for the reason that the screens are always more heavily loaded at their upper ends, and therefore require at such point a more violent agitation.

E indicates the feed-hopper, which is mounted on top of the fixed 'framework and discharges upon the higher end of the top screen or sieve B3.

l. A separator comprising, an inclined spring-supported screen-carrying frame pivoted atits lower or tail end in lixed bearings, means for depressing and suddenly releasing said frame, and a rigidly-secured bumper or contact-piece at the head end to cheek the upward throw thereof.

2. A separator comprising', a main frame, an inclined spring-supported screen-carrying frame pivoted adjustably at its lower or tail end in liXed bearings te vary its inclination. means for depressing and suddenly releasing the screen-carrying frame and a rigidly-secured bumper or contactpiece at the head end to check the throw thereof.

3. A separatercomprising a main frame, an inclined spring-supported spring-carrying frame piveted at its lower or tail end in ixed bearings and provided at its upper or head portieri with a housing and chutes, a pluralityY of graded screens in said housing and parallel with the inclined frame, means for depressing and suddenly releasing the screen-carrying frame, and a rigidly-secured builer or contact-piece on the main frame at the head end of the screen-carrying frame to cheek the upward throw thereof.

4. A separator comprising, a main frame, an inclined screen-carrying frame pivoted at its lowerortail end in lixed bearings, a spring under the head end thereof, means for regulating the tension of the spring, a rotary cam over the head end of the screen-carrying frame and adapted to engage the same, depress it against the action of the spring and suddenly release it, and a rigidly secured buffer on the main frame at the head of the screen-carrying frame to check the upward throw thereof.

5. A separator comprising a main frame having rear uprights provided with a plurality of zuiertures, a rod adjustable to dil'l'erent heights by means of said apertures, an inclined screen-carrying frame pivoted at its rear lower tail end on said rod, aspiral spring supporting the upper or head end of the screen carrying frame, a rod extending through said spring, a nut on the rod to regulate the tension of the spring, a rotary cam on the upper forward end of the main Aframe and engaging the upperor head end el the screencarrying frame to depress and suddenly release it and a buffer on the main frame to check the upward throw of the screen-carrying frame.

6. A separator comprising, an inclined, spring-supported screen-carrying frame pivoted at its lower or tail end in lixed hearings and having a housing at its upper er head portion, a series of screens of graded mesh mounted removably one above the other in said housing, chutes on the housing at the lower rear discharge ends ol said screens, a rotary cam for depressing the screen-carrying frame and suddenlyreleasing it, and a rigidly-secured bumper in the upward path of the head end of the screen-carrying frame to receive the impact thereof.

ln testimony whereof l aiiix my si gnature in presence of two witnesses.

FREDERICK Il. BEMIS. lVitnesses:

J'. E. ELLIsoN, ll. O. Bums.

lOO 

